The whole idea of polarized opposite parties in the U.S. has gotten out of hand. like science is needed for humanity to further progress. To say the left needs to do this, and the right needs to do that is delusional in its own right. The joint effort comes first or should come first along with logical decisions not based on whether you like the opposite party or not. its about the nation as a whole.
If you want to understand why the US seems so uniquely politically divided, then you will understand once you understand how FPTP voting works and how it inevitably leads to binary politics. Most countries have a voting system that leads to broader representation. US politics will always be black and white and divided so long as FPTP voting is used.
There's a great video by cpg grey explaining FPTP: https://youtu.be/s7tWHJfhiyo